My Ds 708 have become too slow since i bought it, its been 4 years, i want to use a new sd card, but i dont have the money right now to buy the update, how can i change to a 16gb card without the update, please help me.
You can copy the entire contents of the old card to your computer, then copy the contents to the new card. You should be doing this anyway to keep a backup. If you don't make a backup and your card gets corrupted or lost you will have to buy an update to replace the contents.